Feeding device for ball-mills.



10.845.992 y PATBNTED MAR. 5, 1907. M. P. ABBEJ PEEDING DEVICE PQR BALLMILLS.

APPLICATION FILED SBPT.21,1906.

MAX F. ABBEF NEW YORK, N. Y.

0E Fon BALL-MILLS.

FEEDING DEVI specification of Lettera Patent. Patented March 5. 190'?.

Applicant nea semmai 21, mee. serai No. 335,556.

rior construction. So, also, all stuiiingboxes between the feeder andthe mill are entirely dispensed with, while the feeder is readilyaccessible for the purpose of inspection. or repair 1. A ball-millhaving a hollow trunnion, combined with an exterior cylindrical casingcomposed of aperforated outer wall, an inner wall, an intermediateperforated partition, a

To all whom it muy concern/.-

Be it known that I, MAX F. A Bz., a citizen of the United States,residing at New York city, Manhattan, county and State of New York, haveinvented newand useful linprovements in Feeding Devices for Ball- Mills,of which the following, is a speciiication.

This invention relates to a feeding device FRANK v. BRIESEN, WILLIAMSCHULZ.

trunn on ball-mills as now in operation with- 55 outo enng the same oraltering their' intelo for tubular ball-mills, which is adapted to be 65attached to the outer end ofthe hollow trunleed-chamber between outerwall and partinion of said mill, so that all interior iittings tion, aspiral conveyer between partition and for feeding purposes may bedispensed with. inner wall, said co'nveyer having a flaring In theaccompanying drawing, Figure 1 is central convolute that opens directlyinto the I a longitudinal section through the ingressouter end of thehollow trunnion, and means 7o head of a ball-mill embodying myinvention; for c nmling the casing to said trunnion, sub- Fig. 2, asection on line 2 2, Fig. 1; and Fig. 3, l stantiail as specified.asection on line 3 '3,F ig. 1. A hall-mill having a hollow trunnion,

The ingress-head1() of the mill 11 is prol combined with an Xteriorcylindrical casing 2o vided with an outwardly-extending hollow composedoia perl rated outer wall, an inner 75 trunnion 12, journaled in bearing13. To i wall, an intermediate perforated partition, a the outer end oftrunnion 12 is adapted to be feed-chamber between outer wall andparticoupled the feeding device made in the forni tien, a spiralconveyor between partition and of a cylindrical casing having an outerwall inner wall, an annular flange on the inner wall 14, an inner wall15, a l an intermediate parthat projects over said trunnion, and means8o tition 16. Between outer wall 14 and parti lor securing said 'liangeto said trunnion, subtion 16 is formed a feed-chamber 17,commustantially as speciified. nicating with feed-pipe 18, that enterscham 3. A ball-mill having a hollow trunnion, ber 17 through a centralperforation 19 in H combined with an exterior 'cylindrical casing 3owall 14. Between partition 16 and inner fast on the outer ond of thetrunnion, and a S5 wall 15 is loeiited a spiral conveyor 20, havA spiralconveyor carried by the casing and ing convolutes ofgradually-decreasing dianihaving convolutes of gradually -decreasingeter and receiving the material tolbe ground l diameter, the centralconvolute of said con from chamber v17 through a series of periphveyercommunicating directly with the outer 3 5 eral openings 21 in partition16. The inner- E end Vot the trunnion, substantially as speci- 9o mostconvo ute 22 of conveyer 20 is daring l tied 1 and communicates with thebore 23 at the 4. A ball-mill having a hollow trunnion, outer end oftrunnion 12,with which it regiscombined with an exterior cylindricalcasing ters, the diameter of the inner end oi the i fast on the outerend of the trunnion an flaring convolute being e ual to that of lcomposed of aperforated outer wall, an inner 95 bore 23. From inner wall1-5 extends an wall, an intermediate perforated partition, a annularflange 24, which rejects over end of feed-chamber between. outer walland parti trunnion 12 and is bolted thereto, as at 25. tion, and aspiral conveyor between partition The entire feeding device -viz., thecasing and inner wall, said conveyor having convo-- with its partition,conveyor, and attachinglutes of gradually-dccrcasing diameter, the iccflange-is made integral, so that strength is central convolutc of saidconveyor communiinsured. The material to be reduced 1s fed eatingdirectly with the outer end of the from ,pipe 18 .into chamber 17 andthence trunnion, substantially as specified. through openings 21 intoconveyor 20, that l Signed by me at New York city, (Manhatso discha esit through hollow trunnion 12 into l tan,) New York, this 20th day ofSeptember, 105

the mil 1 906.

It ll be seen that my improved feeding MAX F. ABBE. devio may bereadiljyT coupled to hollow Vllitnessesz-

